Information exchanged method and device

Abstract

An information exchange method and device for addressing a coordination problem between different access points (APs) caused by low exchange efficiency between the APs. The information exchange method provided in an embodiment of the present invention comprises: determining, by a transmitting AP, an air interface broadcast resource for transmitting information to a receiving AP; and transmitting, by the transmitting AP and based on the determined air interface broadcast resource, the information to the receiving AP in a broadcast form. Adopting the embodiment of the present invention not only allows an air interface transmission to be performed between the APs, but also allows communication between more than two APs. One AP can transmit information thereof, in the broadcast form, to all neighboring APs having a needing to exchange information therewith, thereby improving coordination efficiency between the APs.

The invention claimed is: 
     
       1. A method for exchanging information, the method comprising:
 determining, by a transmitting Access Point (AP), an air interface broadcast resource for transmitting information to a receiving AP; and 
 transmitting, by the transmitting AP, information to the receiving AP by broadcasting the information over the determined air interface broadcast resource; 
 wherein the determining, by the transmitting AP, the air interface broadcast resource for transmitting information to the receiving AP comprises: 
 determining, by the transmitting AP, the air interface broadcast resource as configured by a first network-side device, wherein the first network-side device is a cluster head AP; or 
 determining, by the transmitting AP, the air interface broadcast resource for transmitting information to the receiving AP from a pool of air interface broadcast resources configured by a second network-side device, wherein, the second network-side device transmits the configuration information of the pool of air interface broadcast resources to a cluster head AP in each set of the transmitting APs in a preset area range, so that the transmitting AP determines the air interface broadcast resources as configured by the cluster head AP; 
 wherein the cluster head AP is an AP selected from a set of APs comprising the transmitting AP, wherein any one AP in the set and the cluster head AP can receive air interface information transmitted from each other by broadcasting the information; 
 wherein after the transmitting AP selects the air interface broadcast resource for transmitting information to the receiving AP, the method further comprises: 
 transmitting, by the transmitting AP, resource preemption signaling to the receiving AP to indicate the air interface broadcast resource selected by the transmitting AP; 
 wherein the determining, by the transmitting AP, the air interface broadcast resource for transmitting information to the receiving AP comprises: 
 determining, by the transmitting AP, whether the selected air interface broadcast resource is preempted successfully, according to a feedback message of the receiving AP for the resource preemption signaling; and 
 determining, by the transmitting AP, the selected air interface broadcast resource as the air interface broadcast resource for transmitting information to the receiving AP, upon determining that the selected air interface broadcast resource is preempted successfully. 
 
     
     
       2. The method according to  claim 1 , wherein before the transmitting AP receives the air interface broadcast resource transmitted by the first network-side device, the method further comprises:
 transmitting, by the transmitting AP, a resource request message comprising resource demand information to the first network-side device to request for the air interface broadcast resource. 
 
     
     
       3. The method according to  claim 1 , wherein the second network-side device is a centralized control node managing respective APs in a preset area range, or an Operation Administration and Maintenance (OAM) entity. 
     
     
       4. The method according to  claim 1 , wherein after the transmitting AP transmits the information to the receiving AP by broadcasting the information over the determined air interface broadcast resource, the method further comprises:
 determining, by the transmitting AP, whether the information transmitted by the transmitting AP over the selected air interface broadcast resource is transmitted successfully, according to a feedback message of the receiving AP for the information; and 
 if the information is not transmitted successfully, then reselecting an air interface broadcast resource, and retransmitting the information over the reselected air interface broadcast resource. 
 
     
     
       5. The method according to  claim 4 , wherein the determining, by the transmitting AP, whether the information transmitted by the transmitting AP is transmitted successfully, according to the feedback message of the receiving AP for the information comprises:
 determining, by the transmitting AP, whether the information transmitted by the transmitting AP is transmitted successfully, according to a feedback message of any one receiving AP for the information; or 
 determining, by the transmitting AP, whether the information transmitted by the transmitting AP is transmitted successfully, according to a feedback message of a cluster head AP for the information, wherein the cluster head AP is an AP selected from a set of APs comprising the transmitting AP, and any one AP in the set and the cluster head AP can receive air interface information transmitted from each other by broadcasting the information. 
 
     
     
       6. The method according to  claim 1 , wherein the determining, by the transmitting AP, whether the selected air interface broadcast resource is preempted successfully, according to the feedback message of the receiving AP for the resource preemption signaling comprises:
 determining, by the transmitting AP, whether the selected air interface broadcast resource is preempted successfully, according to a feedback message of any one receiving AP for the resource preemption signaling; or 
 determining, by the transmitting AP, whether the selected air interface broadcast resource is preempted successfully, according to a feedback message of a cluster head AP for the resource preemption signaling, wherein the cluster head AP is an AP selected from a set of APs comprising the transmitting AP, and any one AP in the set and the cluster head AP can receive air interface information transmitted from each other by broadcasting the information. 
 
     
     
       7. A method for exchanging information, the method comprising:
 determining, by a receiving Access Point (AP), an air interface broadcast resource occupied by a transmitting AP; and 
 receiving, by the receiving AP, information transmitted from the transmitting AP by broadcasting the information, over the determined air interface broadcast resource; 
 wherein the determining, by the receiving AP, the air interface broadcast resource occupied by the transmitting AP comprises: 
 receiving, by the receiving AP, resource preemption signaling transmitted by any one transmitting AP, and determining an air interface broadcast resource indicated in the resource preemption signaling as the air interface broadcast resource occupied by the any one transmitting AP, wherein after the receiving AP receives the resource preemption signaling transmitted by the any one transmitting AP, the method further comprises: 
 transmitting, by the receiving AP, a feedback message for the resource preemption signaling to the any one transmitting AP. 
 
     
     
       8. The method according to  claim 7 , wherein after the receiving AP receives the information transmitted from the transmitting AP by broadcasting the information, over the determined air interface broadcast resource, the method further comprises:
 transmitting, by the receiving AP, a feedback message for the received information to the transmitting AP. 
 
     
     
       9. The method according to  claim 7 , wherein the receiving AP is a cluster head AP which is an AP selected from a set of APs comprising the cluster head AP, wherein any one AP in the set and the cluster head AP can receive air interface information transmitted from each other by broadcasting the information.